Paper edge flaring machine



y 1958 L. D. HINCHER 2,841,056

PAPER EDGE FLARING MACHINE Original Filed June 27, 1947 3 Sheets-Sheet 1 III'IIIIIII'IIII'Id INVENTOR.

Lee 0 H117 c/aer ATTORNEY July 1, 1958 L. D. HINCHER PAPER EDGE FLARING MACHINE Original Filed June 27, 1947 3 Sheets-Sheet 2 INVENTOR.

L ee D. fiinc/aer uwuz h A Trap/v.6 Y.

L. D. HINCHER PAPER EDGE FLARING MACHINE Original Filed June 27, 1947 July 1 1958 3 Sheets-Sheet 3 a e e United tatcs Patent 2,841,056 PAPER EDGE FLARING MACHINE Lee D. cher, Seattle, Wash.

Original application June 27, 1947, Serial No. 757,558. Divided and this application September 18, 1953, Serial No. 381,047

3 Claims. (Cl. 93-36) This invention relates to a machine for the production of paper box bodies, and particularly that type of paper box body which is comprised of a band member producing the side walls of the boxbody and a flat base member upon which the band member seats and to which the latter is cemented by the instrumentality of applying glue to the seating edge. The present application is a division of my pending application, Ser. No. 757,558, filed June 27, 1947, now abandoned. The type of construction to which the present invention especially adapts itself is one in which the glue line between the base and its attached band piece lies in spaced paralleling relation to the marginal edge of the base, leaving a material part of the base projecting outwardly as a flange beyond the side wall of the produced box section, and boxes of this nature are commonly known as flanged boxes. They particularly lend themselves to production of irregular shapes and such, for example, as a heart design.

There has heretofore arisen within the trade an objection to flanged boxes constructed in the manner described due to the fact that the cardboard stock from which the band members are produced is comparatively thin and the limited bearing thus provided has not permitted the application of sufficient glue to secure the seating edges firmly throughout its perimeter. The result has been that the band member not infrequently separates from the'base to which it is attached. With the foregoing in mind, it is the object of the present invention to provide a machine by whichthe band for a box of the described character can be produced from cardboard stock of no wider thickness than that which has been previously used but which gives to said band member a bearing edge of very substantial width.

With the above general objects, and other more particular objects and advantages in view, which will each appear and be understood in the course of the following description and claims, the invention consists in the novel construction and in the adaptation and combination of parts hereinafter described and claimed.

In the accompanying drawings:

Figure 1 is a side elevational view illustrating a machine for processing a strip of comparatively thin cardboard stock to cause one edge of the same, and namely the edge which is intended to be cemented to a base board, to be flattened out. Represented in the view is a strip of cardboard stock being processed by the machine.

Fig. 2 is a transverse vertical sectional view thereof on broken line 2-2 of Fig. 3, the scale being enlarged from that of Fig. 1.

Fig. 3 is a horizontal sectional view on broken line 3-3 of Fig. 2.

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Fig. 5 is a fragmentary transverse vertical section taken to an enlarged scale on line 5-5 of Fig. 4.

Fig. 6 is a top plan View illustrating a templet to which the band-forming strip is applied for shaping the band and which said step is performed following the procedural steps of first running the band-forming strip through the edge-flattening machine after having previously scored and cut the same to length, and then bringing the two ends of the edge-flattened strip into overlapping relation and either stapling or cementing the same together to produce the band.

Fig. 7 is a fragmentary transverse vertical section taken to an enlarged scale on line 7-7 of Fig. 6 and showing the manner in which the templet-carried band is passed over a wiping roller for applying glue to the flattened edge of the band, the roller being represented by dotted lines.

Fig. 8 is a view partly in top plan and partly in horizontal section illustrating a jig to which the templetcarried band is applied and which, being performed after the glue-applying step, serves to center the band in relation to a base board therefor as the two members are caused to be cemented together; and

Fig. 9 is a transverse vertical section taken to an enlarged scale on line 9-9 of Fig. 8.

Referring to said drawings, and first considering the machine shown in Figs. 1, 2 and 3, such machine is one in which the cardboard strip, denoted by the letter s, is fed horizontally between a pair of identical pressure rollers 10 and 11 carried on live shafts 13 and 12, respectively, driven in opposite directions of rotation by means such as the indicated power-driven belt 14 and the intermeshing transfer gears 15-16. The bottom roller 10 operates about a fixed axis whereas the other or top roller 11 is, by preference, arranged for limited vertical adjustment. To accommodate this action, the shaft 12 is indicated as having its inner end journaled in a bearing 17 trunnion-mounted for vertical swinging movement about a transverse horizontal axis, and its outer end journaled in a bearing box 18 slidably received in a vertical guide-way and with an adjusting screw 19 bearing upon the upper end of the box. The numeral 20 denotes the machine housing.

Applied fore and aft, respectively, of the gap described between the rollers, there is provided a chisel member 21 and a buttress bar 22, the chisel being firmly supported to lie in acute angular relation to the median line of travel of the advancing strip with its chisel tip 23 projecting into close proximity of the rollers, and the buttress bar being likewise firmly supported to occupy a position parallel to said median line of travel and spaced from the chisel tip a distance less than the width of the strip. The buttress bar takes the thrust from the chisel-pressed strip and for its mounting is represented as providing a transverse arm extension 24 received for transverse adjustment in a slide-way 25 of a bracket 26 fastened to the machine housing 20. To secure this arm in its adjusted position there is provided a screw 27 received through aslot 28.

In supporting the chisel member I provide a clamping structure comprised of a stationary jaw 30 made integral with an outrigger extension 31 of the bracket 26 and having a complementing movable jaw 32 brought to bear against the chisel member by a clamping screw 33. The upper end of the movable jaw bears against the stationary jaw and becomes the fulcrum for the former.

From the foregoing, it will be understood that the leading end of the strip s is introduced between the rollers and by the frictional grip of the latter is drawn through the same. As the outer edge traverses the chisel tip the latter acts by scraping pressure to compress and 3 spread the marginal fibers of the cardboard and causes the edge to become flared, producing that which in effect is a substantial flange denoted f.

The shaping templet or" the present invention (see Figs. 6, 7, 8 and 9) provides a core 35 fixedly secured upon a backing board 36, and assuming that the chamber of the box which is to be produced is that of the heart form illustrated in Fig. 4, the core will be shaped in correspondence, and namely a roundish or oval figure having an obtuse point at one end and at the other end a corresponding indentation. On the major axis of the templet and spaced outwardly from the point of the indentation a distance approximately the thickness of the strip s there is provided a vertical pin 37.

The strip will by preference have been cut to length and scored prior to its said flanging treatment, and this cutting is such as will give to the strip a length somewhat larger than the circumference of the core, while the scoring is performed transverse to the length and at two points, one proximate to but spaced from one extremity of the strip and the other removed therefrom a distance substantially corresponding to one-half the circumference. The short tab t which lies beyond the end scoring is now placed in lapping relation to the other end of the strip and is either stapled, cemented or otherwise secured to the latter, whereupon the resulting band is placed over the core, fitting the center crease over the obtuse point of the latter and inserting the other crease between the indentation and the pin (see Fig. 6). The core with the band thereon, and with the flared margin 1 of the band lying uppermost, is thereupon passed over a glue-applying roller 38 (Fig. 7), and is now ready to be cemented to the top or bottom, as the case may be, of the box.

Denoted b, said top or bottom is comprised of a flat piece of cardboard likewise cut to a heart shape but somewhat larger than the plan configuration of the shaped band, and for centering the band upon the top or bottom piece I employ the jig illustrated in Figs. 8 and 9. Such jig is comprised simply of a base 39 to which are secured a set of three positioning fingers each cut away upon the underside to provide an overhanging lip 43. The lipped side of one of these positioning fingers, denoted 40, presents a re-entrant angle reversely corresponding to the obtuse point of the heart figure and the other two fingers, denoted 41 and 42, have their lipped sides made slightly concave and such, more especially, as to substantially fit the cheek contour of the heart. With these three positioning fingers being fixedly secured upon the base of the jig to occupy the indicated positions, the procedure in using the jig is to insert the box-forming member b under the lips 43 and while holding this piece snugly against the back wall of the undercut press the glue-coated flange f of the templet-carried band down upon the same, coincidently positioning the band by bringing the latter against the lips 43 of the three positioning fingers. Upon removal from the jig, the glue-connected box body is placed under suitable pressure for such period as may be necessary for curing the glue.

It is thought that the invention will have been clearly understood from the foregoing detailed description having reference to my illustration of a now-preferred embodiment. Structural changes well within the spirit of the invention will suggest themselves, and in this respect it is here pointed out that the member 21 need not have a chisel tip in that any configuration is suitable which is capable of subjecting the advancing strip to such a force as will break down the tips of the fibers and cause the same to spread and thus flare the edge of the strip. I find, for example, that a member whose working tip,

when viewed in side elevation, has a rounded configuration may satisfactorily be employed. I intend that no limitations be implied and that the hereto annexed claims be given a scope in their construction commensurate with the broadest interpretation to which the employed language admits.

What I claim is:

1. A machine for flaring an edge of a strip of cardboard or other like stock to give to the edge an expanded width by comparison with the normal width of the stock, and which comprises a pair of live pressure rollers arranged and adapted to have the strip fed therebetween, a stationary buttress member mounted at one end of the rollers and bearing against an edge of the strip as it is fed between the rollers, and a stationary blade mounted to lie diagonal to the strip at the other end of the rollers and providing a chisel tip bearing upon the other edge of the travelling strip and subjecting the latter to a wiping pressure of sufficient intensity to break down and spread the marginal fibers of the strip in a direction lateral to the longitudinal median line of the strip.

2. A machine for flaring an edge of a strip of cardboard or other like stock to give to the edge an expanded width by comparison with the normal width of the stock, and which comprises a pair of pressure rollers arranged and adapted to have the strip fed therebetween, drive means acting through the rollers to give endwise travel to the strip, a stationary buttress member mounted at one end of the rollers and bearing against an edge of the strip as it is fed between the rollers, and a stationary blade mounted to lie diagonal to the strip at the other end of the rollers and providing a chisel tip bearing upon the other edge of the travelling strip and subjecting the latter to a wiping pressure of sufficient intensity to break down and spread the marginal fibers of the strip in a direction lateral to the longitudinal median line of the strip.

3. A machine for flaring an edge of a strip of cardboard or other like fibrous stock to give to the edge an expanded width by comparison with the normal thickness of the stock, and which comprises a pair of pressure rollers at least one of which is driven and adapted to have the strip fed along a travel plane therebetween, buttress means having a buttress surface arranged to bear against one of the edges of a fed strip and located near one end of said rollers to resist transverse crushing force imposed upon the other edge of such strip, edge-crushing means near the other end of said rollers and presenting a crushing surface placed so as to firmly press against said other edge of the strip at a point opposite said buttress means and spaced from the buttress surface of the latter a distance less than the normal width between said edges of the strip, said crushing surface being sub stantially longer than the normal thickness of said edge against which it presses and having said length disposed at cross angles to said travel plane of the strip, whereby there is imposed upon said edge of the strip against which the crushing surface presses a crushing force of such intensity and character as will force the latter edge inwardly and cause the marginal fibers composing said edge to be crushed and spread in opposite directions from said travel plane.

References Cited in the file of this patent UNITED STATES PATENTS 606,916 Cartier July 5, 1898 1,575,741 Deline Mar. 9, 1926 2,106,271 Dallas Jan. 25, 1938 2,637,252 Swisher May 5, 1953 2,682,909 Claff et al. July 6, 1954 

